Bagieński W. Designing the Structure of the Office of State Protection (UOP) by the Officers of the Security Service in the First Months of 1990. PAIPN [Internet]. 2022 Dec. 30 [cited 2026 Nov. 10];(15):381–428. Available from: https://czasopisma.ipn.gov.pl/index.php/pa/article/view/2299